import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

// 导入全局样式表
import '../assets/css/global.css'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    { path: '/home', component: Home }
  ]
})

// 挂载路由导航守卫
router.beforeEach((to, from, next)=>{
/**
 * to: 将要访问的路径
 * from: 代表从哪个路径跳转而来
 * next: 是一个函数，表示放行
 * next() 放行  next('/login')  强制跳转
 */
  if (to.path === '/login') {
    return next();
  }
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token');
  console.log(tokenStr)
  if (!tokenStr) return next('/login');
  next()
})

// 暴露路由
export default router
